[kde] [Bug 480797] Gamescope has very poor performance if Steam is launched via KRunner/Apps menu, runs normally when launched via Konsole

[bugzilla_noreply at kde.org]

https://bugs.kde.org/show_bug.cgi?id=480797

--- Comment #1 from burneddi at gmail.com ---
After looking at the difference in the environment between the two methods of
launching Steam, I have isolated this issue to the KRunner/startmenu launch
method setting DRI_PRIME=pci-0000_00_02_0, which is my integrated GPU instead
of my dedicated GPU. Steam seems to be smart enough to use my dedicated GPU for
rendering the actual game (or else the performance would be even worse), but
Gamescope seems to be using the iGPU for some of its business which causes the
performance issue.

Where might I find the correct lever to pull to stop KRunner from setting
DRI_PRIME to my iGPU?

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